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55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
package fx
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import (
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"context"
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"time"
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)
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var (
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// ErrCanceled is the error returned when the context is canceled.
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ErrCanceled = context.Canceled
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// ErrTimeout is the error returned when the context's deadline passes.
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ErrTimeout = context.DeadlineExceeded
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)
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// DoOption defines the method to customize a DoWithTimeout call.
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type DoOption func() context.Context
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// DoWithTimeout runs fn with timeout control.
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func DoWithTimeout(fn func() error, timeout time.Duration, opts ...DoOption) error {
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parentCtx := context.Background()
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for _, opt := range opts {
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parentCtx = opt()
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}
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ctx, cancel := context.WithTimeout(parentCtx, timeout)
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defer cancel()
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// create channel with buffer size 1 to avoid goroutine leak
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done := make(chan error, 1)
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panicChan := make(chan interface{}, 1)
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go func() {
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defer func() {
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if p := recover(); p != nil {
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panicChan <- p
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}
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}()
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done <- fn()
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}()
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select {
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case p := <-panicChan:
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panic(p)
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case err := <-done:
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return err
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case <-ctx.Done():
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return ctx.Err()
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}
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}
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// WithContext customizes a DoWithTimeout call with given ctx.
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func WithContext(ctx context.Context) DoOption {
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return func() context.Context {
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return ctx
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}
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}
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